Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 271259
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
459 AM PST SAT DEC 27 2014

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-11 MPH.         SW 14-20 MPH.
TRANSPORT WINDS               S 4-11 MPH.         SW 13-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN DEC 28        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          136 (POOR).
OUTLOOK FOR SUN DEC 28        204 (POOR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-W 2-4 MPH.       SE-S 5-10 MPH.
TRANSPORT WINDS               SW-W 2-4 MPH.       SE-S 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN DEC 28        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          54 (POOR).
OUTLOOK FOR SUN DEC 28        201 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-15 MPH.         S 13-23 MPH.
TRANSPORT WINDS               S 7-13 MPH.         S 12-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN DEC 28        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          158 (POOR).
OUTLOOK FOR SUN DEC 28        215 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       51 (POOR)
ELLENSBURG     43 (POOR)
GOLDENDALE     78 (POOR)
TRI-CITIES     95 (POOR)
WALLA WALLA   235 (POOR)
YAKIMA         40 (POOR)
BEND           47 (POOR)
PRINEVILLE     70 (POOR)
ENTERPRISE    100 (POOR)
HERMISTON     102 (POOR)
JOHN DAY       66 (POOR)
LA GRANDE     151 (POOR)
MADRAS         64 (POOR)
MEACHAM       103 (POOR)
PENDLETON     128 (POOR)
REDMOND        65 (POOR)
SENECA         63 (POOR)
THE DALLES     43 (POOR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$







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